<template>
  <div class="cmt-container">
    <h3>发表评论</h3>
    <hr>
    <textarea placeholder="请输入评论内容（最多输入120字）" maxlength="120" v-model="msg"></textarea>
    <mt-button type="primary" size="large" @click="postComment">发表评论</mt-button>
    <div class="cmt-list">
      <div class="cmt-item" v-for="(item, i) in comments" :key="item.add_time">
        <div class="cmt-title">
          第{{i+1}}楼&nbsp;&nbsp;用户：{{item.user_name}}&nbsp;&nbsp;发表时间：{{item.add_time | dateFormat}}
        </div>
        <div class="cmt-body">{{item.content === 'undefined' ? '此用户很懒，啥都没说' : (item.content === '' ? '此用户很懒，啥都没说' : item.content)}}</div>
      </div>
    </div>
    <mt-button type="danger" size="large" plain @click="getMore">加载更多</mt-button>
  </div>
</template>

<script>
import {Toast} from 'mint-ui'
export default {
  data () {
    return {
      pageIndex: 1,
      comments: [],
      msg: ''
    }
  },
  created () {
    this.getComments()
  },
  methods: {
    getComments () {
      this.$http.get('http://www.liulongbin.top:3005/api/getcomments/' + this.id + '?pageindex=' + this.pageIndex).then(result => {
        if (result.body.status === 0) {
          this.comments = this.comments.concat(result.body.message)
        } else {
          Toast('加载评论失败...')
        }
      })
    },
    getMore () {
      this.pageIndex++
      this.getComments()
    },
    postComment () {
      if (this.msg.trim().length === 0) {
        Toast('评论内容不能为空')
      }
      this.$http.post('http://www.liulongbin.top:3005/api/postcomment/' + this.$route.params.id, {content: this.msg.trim()}).then(result => {
        if (result.body.status === 0) {
          let cmt = {
            user_name: '匿名用户',
            add_time: Date.now(),
            content: this.msg.trim()
            }
          this.comments.unshift(cmt)
          this.msg = ''
        }
      })
    }
  },
  props: ['id']
}
</script>

<style lang="scss" scoped>
.cmt-container{
  h3{
    font-size: 18px;
  }
  textarea{
    font-size: 14px;
    height: 85px;
    margin: 0;
  }
  .cmt-list{
    margin: 5px 0;
    .cmt-item{
      font-size: 13px;
      .cmt-title{
        line-height: 30px;
        background-color: #ccc;
      }
      .cmt-body{
        line-height: 35px;
        text-indent: 2em;
      }
    }
  }
}
</style>
